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JavaScript: Find the greatest common divisor of two positive numbers

JavaScript Function: Exercise-2 with Solution

Write a JavaScript program to find the greatest common divisor (gcd) of two positive numbers.

Pictorial Presentation:

JavaScript: Find the greatest common divisor of two positive numbers

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Recursive function to find the GCD of two numbers</title>
</head>
<body>

</body>
</html>

JavaScript Code:

var gcd = function(a, b) {
    if ( ! b) {
        return a;
    }

    return gcd(b, a % b);
};
console.log(gcd(2154, 458));

Output:

2

Flowchart:

Flowchart: Flowchart: JavaScript recursion function- Find the greatest common divisor(gcd) of two positive numbers

Live Demo:

See the Pen javascript-recursion-function-exercise-2 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Add padding to the beginning of a string

const name = 'Minta Lofton';
console.log(name.padStart(13));
console.log(name.padStart(2));

With the padStart method, we can add padding to the beginning of a string. The value passed to this method is the total length of the string together with the padding. The string "Minta Lofton" has a length of 12. name.padStart(13) inserts 1 space at the start of the string, because 12 + 1 is 13.
If the argument passed to the padStart method is smaller than the length of the array, no padding will be added.

Ref: https://bit.ly/3jFRBje